词语bituminous coal
解释沥清煤,烟煤
bituminous coal〔名词〕烟煤详细»
bituminous coal沥青煤,烟煤详细»
bituminous coal〔名词〕沥青煤,烟煤详细»
bituminous coal〔名词〕烟煤,肥煤详细»